LTM2881HV-5#PBF

Overview

The LTM2881HV-5#PBF is a complete galvanically isolated full-duplex RS485/RS422 μModule transceiver manufactured by Analog Devices Inc. It integrates a high-speed digital isolator and an isolated DC/DC converter within a single package, eliminating the need for external components. The device supports data rates up to 20 Mb/s with a supply voltage range of 4.5 V to 5.5 V. It features a 2500Vrms isolation voltage and a common mode transient immunity of 30kV/µs. Operating temperatures range from -40°C to +105°C in an LGA-32 package.

Feature Summary

• Integrates a complete isolated RS485/RS422 transceiver with an internal isolated DC/DC converter, requiring no external components.
• Provides galvanic isolation with 2500Vrms voltage rating and high common mode transient immunity for robust signal integrity.
• Supports full-duplex communication at data rates up to 20 Mb/s across RS422 and RS485 protocols.

Applications

• Industrial automation systems requiring isolated serial communication
• Process control networks utilizing RS485 or RS422 standards
• PROFIBUS fieldbus applications

Procurement Notes

Verify the specific suffix (HV) against the design requirements to ensure the extended temperature range (-40°C to +105°C) matches the application environment. Confirm that the LGA-32 package footprint aligns with the PCB layout. Check current availability status as distribution may be limited. Ensure the development kit compatibility if prototyping is required.

Selection Notes

Select this component when a compact, fully integrated isolated interface is needed without external magnetics or capacitors. The HV variant is suitable for industrial environments requiring wide operating temperature ranges. Compare against standard transceivers if board space is constrained and high isolation voltage is mandatory. Verify power budget constraints given the integrated converter characteristics.

Part Context

This part belongs to the LTM2881 series of μModules, which are designed to simplify the implementation of isolated serial interfaces. The series includes variants with different temperature ratings and speed options. The LTM2881 family addresses the complexity of designing discrete isolated circuits by providing a pre-certified, compact solution for harsh electrical environments.

Replacement Considerations

Direct substitutes include other LTM2881 variants such as LTM2881IV-5#PBF or LTM2881CV-5#PBF, depending on the required operating temperature range. Ensure the replacement maintains the same LGA-32 package and functional isolation specifications.

FAQ

Does the LTM2881HV-5#PBF require external components for isolation?

No, it integrates an isolated DC/DC converter and digital isolator, requiring no external components for basic operation.

What is the maximum data rate supported by this module?

The module supports data rates up to 20 Mb/s.